Once its come to their attention, no manager/director is going to go to one of their dev's or designers and say "Hey, go ask person x to take that down...".

If this situation escalated it could look sloppy on their part if they didn't handle it properly with the correct resources from the beginning.

There is no reason why this issue at hand can't be handled in a professional manner - in this case by an actual lawyer.

I've received a number of C&D and this to me is by far the most level-headed and polite that I've seen in a long time.

Just because you didn't expect a response form a lawyer doesn't mean its "aggressive" by default.